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I'm using a modified version of firmware from November 2023 I believe. Had to go to that to support a 36-2 trigger wheel and haven't wanted to go through the hassle of changing it since.
I'm using 2024.02.1 on my NB2 SpeedyEFI. Seems to be the most stable build yet. I believe my VVT control issues had to do with the earlier firmware versions.